<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>权限列表</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表区域 -->
      <el-table :data="rolelist" border stripe>
        <!-- 展开行 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
            >
              <!-- 渲染一级 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级 -->
              <el-col :span="19">
                <el-row
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                    >{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="(item3, i3) in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                    >{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作">
          <template slot-scope="scope" width="300px">
            <el-button type="primary" icon="el-icon-edit">编辑</el-button>
            <el-button type="danger" icon="el-icon-delete">删除</el-button>
            <el-button type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 分配权限的对话框 -->
    <el-dialog title="提示" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
        <!-- 树状控件 -->
      <el-tree show-checkbox default-expand-all :data="rightslist" :props="treeProps" node-key="id" :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
  <!-- 卡片视图 -->
</template>
<script>
export default {
  data() {
    return {
      // 所以角色列表数据
      rolelist: [],
      // 控制分配权限的对话框的弹出
      setRightDialogVisible: false,
      //所有权限的数据
      rightslist: [],
    //   树形控件的属性绑定对象
      treeProps: {
          label: 'authName',
          children: 'children'
      },
    //   默认选中id值的数值
      defKeys: [],
    //   当前即将分配角色权限的id
    roleId: ''
    };
  },
  created() {
    this.getRolesList();
  },
  methods: {
    async getRolesList() {
      const { data: res } = await this.$http.get("roles");
      if (res.meta.status !== 200) {
        return this.$message.error("获取角色列表失败");
      }
      this.rolelist = res.data;
      console.log(this.rolelist);
    },
    // 删除3级权限
    async removeRightById(role, rightId) {
      // 弹框提示用户是否删除
      const confirmRrsult = await this.$confirm(
        "此操作将永久删除该文件, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning"
        }
      ).catch(err => err);
      if (confirmRrsult !== "confirm") {
        return this.$message.info("取消了删除");
      }
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      );
      if (res.meta.status !== 200) {
        return this.$$message.error("删除权限失败");
      }
      role.children = res.data;
    },
    // 展示分配权限的函数
    async showSetRightDialog(role) {
        this.roleId = role.id
        // 获取所有权限的数据
        const {data: res} = await this.$http.get('rights/tree')
        
        if (res.meta.status !== 200) {
        return this.$message.error("获取权限失败");
      }
      this.rightslist = res.data
      console.log(this.rightslist)
    //   获取三级节点的id
      this.getLeafKeys(role,this.defKeys)
      this.setRightDialogVisible = true
    },
    getLeafKeys(node, arr) {
        //通过递归的形式。获取角色下所有三级权限的id，并保存到defkeys
        //如果当前node节点不包含chilren
        if(!node.children) {
            return arr.push(node.id)
        }
        node.children.forEach(item => {
            this.getLeafKeys(item, arr)
        });
    },
    //监听分配权限对话框的关闭事件
    setRightDialogClosed() {
        this.defKeys = []
    },
    // 点击为色分配权限
    async allotRights() {
      const keys = [
          ...this.$refs.treeRef.getCheckedKeys(),
          ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      //console.log(keys)
      const idStr = keys.join(',')
      const {data: res} = await this.$http.post(`roles/${this.roleId}/rights`, {rids: idStr})
      if (res.meta.status !== 200) {
        return this.$message.error("分配权限失败");
      }
      this.$message.success('分配权限成功')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  }
};
</script>
<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}

.vcenter {
  display: flex;
  align-items: center;
}
</style>